Boiler for hot water heating systems



Jan. 9, 1934. Q s BURMAN 1,942,915

BOILER FOR HOT WATER HEATING SYSTEMS Filed July 25, 1952 s Sheefs-Sheet 1 bl en/or' GZOF 6. BURMA Y Jan. 9, O 5 BURMAN 1,942,915

BOILER FOR HOT WATER HEATING SYSTEMS Filed July 25, 1932 3 Sheets-Sheet 2 Jan. 9, 1934. o. s. BURMAN BOILER FOR HOT WATER HEATING SYSTEMS Filed.July 25, 1932 3 Sheets-Sheet 3 mi n mmvxAwiiin lriiniirli n Irma-1 1-5::

Patented Jan. 9, 1934 BOILER FOR HOT WATER HEATING SYSTEMS Olof S. Burman, Minneapolis, Minn.

Application July 25, 1932. Serial No. 624,543

6 Claims.

My present invention relates to heating systems for dwellings and the like, and has for its object the provision of a highly efficient boiler for a hot water heating system. To the above end, the invention consists of the novel devices, combinations of devices and arrangement of parts hereinafter described and defined in the claims.

In the accompanying drawings, which illustrate the invention, like characters indicate like parts throughout th several views.

Referring to the drawings:

Fig. 1 is a view principally in section taken on the line 1-1 of Fig. 2.;

Fig. 2 is a View partly in plan and partly in horizontal section taken on the line 2-2 of Fig. 1;

Fig. 3 is a fragmentary detail view principally in section taken on the line 3-.3 of Fig. 2, on .an enlarged scale; and

Fig. 4 is a view partly in rear elevation and partly in vertical section taken on the line {l-l of Fig. 2.

The improved hot water heating boiler, as shown, includes front, rear and intermediate :cast metal vertical sections 5, 6 and 7, respectively. By adding one or more intermediate sec,- tions '7, to the assembly shown, the size of the boiler may be varied at will, depending on the number of feet of radiation required for the heating system of which the improved boiler goforms a part. The sections 5, 6 and 7 are rig:- idly connected by upper and lower pairs of tie.- rods -8 and 9, respectively, and have the customary upper and lower communicating connec- :tions for the circulation of water.

A base 10, on which the sections'5, 6 and 7 rest, includes front, rear and side plates 11, 12 and 13, respectively. These base-forming plates 1 1, 12 and 13 are detachably connected and held in rectangular arrangement by nut-equipped .4o'bolts l4 and co-operating lugs 15. Said lugs 15 are integral with the base plates 11 and 12, extend parallel to the side plates 13 on the inside of said base, and the bolts 14: extend through holes in said side plates and notches in the lugs '15 and frictionally hold said lugs and bolts interlocked.

Each section 5, 6 and '7 includes a pair of side water legs 16 and an intermediate cross flow connection 17 and an upper cross flow connection 18 therebetween. The front section 5 further includes a cross flow connection 19, a pair of front water legs 20, which have communication with the respective water legs 16, and the cross flow connections 17, 18 and 19. The rear 55 section 6 also further includes a rear water leg 21 which is in communication with its water legs 16 and cross flow connection 17.

Between the cross flow connections 17 and 18, which are vertically spaced, is a wide smoke flue 22, the sides of which are formed by the water 0 legs 15 and which flue extends from the front to the rear of the boiler. Formed in the face plate 23, of the front section 5, is a door-equipped opening 24 "for the fire or combustion chamber and which opening is formed by the water legs 26 and the cross flow connections 17 and 19 of said section. The four walls of the combustion chamber 25 are formed by the water legs 16, 20 and 21 and the cross flow connections 17 and 19 or" the front section 5 and the top of said chamber is formed by the cross flow connections 17.

The combustion chamber 25 has communication with the smoke flue 22, at the front of the boiler, through a vertical smoke passageway 26 in the front section 5 between its water legs 16 and the cross fiow connections 17 of said front section and the intermediate section 17. The boiler is further provided with a door-equipped opening 2'7 between the water legs 20 and below so the cross flow connection 19. This opening 27 is formed in part in the front section 5 and in part in the base plate 11 and, as shown, the door therefor has a central opening 28 through which projects the nozzle X, indicated by broken lines, of an oil burner, not shown.

In case coal is used as a fuel for the boiler, a. suitable grate will be installed in the combustion chamber 25 and the base used as an ash pit from which ashes may be removed from time to time through the door-equipped opening 27. For a coal burning boiler the base will be made somewhat deeper than when fuel oil is used.

The boiler is provided with a shell or jacket 29 comprising panels of suitable insulating material for the sides, back and top of said boiler. Thetop panel of the jacket 29 is vertically spaced from the top .of the boiler and forms the top oi. an upper smoke flue 30, the sides of which are closed by a pair of baiile plates 31. The side panels of the jacket 29 are spaced from the water legs 16 to form on each side of the boiler a smoke compartment or branch smoke flue 32, and the back panel of said jacket is spaced from the rear water leg 21 to form a smoke compartment or smoke flue 33 that connects the two branch flues 32 for the passage of smoke therein to a smoke escape opening 34 in said back panel at the bottom and transverse center of said flue 33.

Secured to the jacket 29, at the back thereof, is a casting having a so-called smoke ring which completely surrounds the opening 34 for connecting a smoke pipe, not shown, to the boiler. Also formed in the back panel of the jacket 29, above the opening 34, is a second opening which leads to a damper-controlled check 36 in the casting for the smoke ring 35.

Attached to the back of the section 6 and the side bafiie plates 31 is a U-shaped baffle or partition 37 in the rear smoke flue 33 that extends from the bottom of the smoke flue 22 to the baffie plates 31 and forms a passageway or connection 38 between the rear ends of the two flues 22 and 30.

The baflie plates 31 are endwise spaced from an extension 39 of the face plate 11 to leave smoke openings 40 which lead from the upper smoke flue 30 to the branch smoke flues 32. This face plate extension 39 forms a closure for the front of the jacket 29. By varying the size of the smoke flue openings 40, the desired draft to the smoke pipe may be obtained. To vary the size of the smoke openings 40, baffle plates 31 of different lengths may be used or long baflie plates provided and their front end portions cut off to leave openings of the desired size. It will be noted that the bafiie plates 31 project at substantially forty-five degrees from the horizontal shoulders of the sections 5, 6 and '7 to the corners formed by the side and top panels of the jacket 29. The baffle plates 31 are detachably secured to the sections 5, 6 and '7 by nut-equipped bolts and apertured lugs integral with said sections, as indicated at 41. The side and top panels of the jacket 29 rest at their longitudinal edges in seats 42 in the baffie plates 31 at their outer longitudinal edge portions.

Formed on the top of each section 5, 6 and 7, midway between their water legs 16, is an upstanding neck 43 having in its top an internally screw-threaded opening for a hot water heat pipe connection. As shown, a pair of hot water heat pipes 44 lead one from the front section 5 and the other from the rear section 6 and have receiving ends screwed into the openings in the respective necks 43. The opening in the neck 43 of the intermediate section '7 is closed by screw plug 45. A pair of cold water return pipes 46 lead to the rear water leg 21 and have their delivery ends screwed into openings formed in bosses47 on the back of said leg.

Formed in the front section 5, by its water legs 20 and cross flow connections 17 and 18, is

- a door-equipped clean-out opening 48 for the smoke flue 30.

Each panel of the jacket 29, as shown, is made up of relatively thick sheets of suitable insulating material, such as asbestos. As shown, the side and back panels of the jacket 29 each includes two of these sheets while the top panel thereof includes an extra top sheet secured by screws to the underlying sheets. The edge portions of the two lower sheets in the top panel of the jacket 29 project outward of the upper sheet thereof to receive panel-holding means, as will presently appear.

In the back of the face plate extension 39, at the vertical and top edge portions thereof, are channeled seats 49 in which the front edge portions of the side and top panels of the jacket 29 extend to hold the same in place. It will be noted that the outer sides of the seats 49, at the inner portions thereof, are inwardly contracted so that said panels are pinched or compressed when forced therein to form tight joints between the jacket 29 and the face plate extension 39.

The side and top panels of the jacket 29 are held on the seats 42 by clamping strips 50 that are segmental in cross-section. These clamping strips 50 cover the joints between the side and top panels of the jacket 29 with their longitudinal edge portions resting on said panels. Screws 51, which extend through holes in the clamping strips 50, have threaded engagement with the baffle plates 31 and frictionally clamp said strips onto the side and top panels of the jacket 29 which form tight joints between said panels.

To hold the clamping strips 50 against endwise movement from the face plate extension 39 and thereby hold the side and top panels of the jacket 29 in the seats 49, said strips are attached to the extension 39 by screws 52 which extend through slots in said extension and have threaded engagement with lugs 53 on the inner sides of the clamping strips 50. Obviously, the slots in the face plate extension 39, for the screws 52, permit the required movement of the clamping strips 50 under the action of the screws 51.

Vertical corner angle strips 54 cover the joints between the side and back panels of the jacket 29 and overlap the respective edge portions of said panels. An angle strip 55 covers the joint between the top and back panels of the jacket 29 and overlaps the respective edge portions thereof. These angle strips 54 and 55 are secured by screws to the panels of the jacket 29 and form tight joints therebetween.

The side panels of the jacket 29 rest on the top flanges of the base plates 13 and are held by upstanding flanges 56 formed with said plates against outward movement. To hold the side panels of the jacket 29 pressed outward against the flanges 56 and form tight joints between said 1 panels and flanges, sand 5'7 is poured on the horizontal flanges of the base plates 13 between said panels and the sections 5, 6 and 7.

The back panel of the jacket 29 rests on the top horizontal flange of the base plate 12 and 1 is held against outward movement by an upstanding flange 58 formed with said plate and. against inward movement by a horizontal flange 59 on the rear water leg 21 and the bosses 4'7 and form tight joints therebetween. The horizontal flanges of the base plates 13 form the closed bottoms of the branch smoke flues 32 and the bosses 47 and flange 59 form the bottom of the smoke flue 33.

From the above description it is evident that the travel of the products of combustion in the boiler shown are from the back and bottom of the fire chamber 25 upward and forward to the front of the boiler where they enter the flue 22 through the opening 26. In the flue 22 the prod- 135 ucts of combustion travel to the rear of the boiler where they pass into the upper flue 30 through the passageway 38 and through said upper flue to the front of the boiler where they divide and tests there is very little stack loss. 15f- The insulating plates of the jacket 29 absorb considerable heat when the oil burner is in action and remain hot for a relatively long time after the oil burner has been shut oif and thereby prevent rapid cooling of the water in the boiler. The insulating plates may be easily removed thus exposing the normally covered parts of the boiler so that the same may be easily cleaned.

What I claim is:

1. A boiler of the class described having a combustion chamber, a casing for the boiler comprising top and side panels, the top panel of the casing being spaced from the top of the boiler to form an upper smoke flue, the receiving end of which is in communication with the combustion chamber, the sides of the casing being spaced from the side panels of the boiler to form branch smoke fiues, a pair of bafiie plates secured at one of their longitudinal edge portions to the boiler and having at their other longitudinal edge portions seats for the top and side panels, said bafile plates forming partitions between the upper fiue and the branch fiues, and arranged to leave smoke openings between the upper flue and the branch ilues, said casing having a smoke pipe opening with which the branch lines have communication, and means for securing the panels in the seats.

2. The structure defined in claim 1 in which the boiler is provided with a face plate that extends outwardly from the top and sides thereof to form a face plate extension, said face plate extension and baflie plates having seats in which the panels are supported.

3. A boiler of the class described having a combustion chamber, the boiler being provided with a face plate that extends outwardly of the boiler at the sides and top thereof to form a face plate extension, a casing for the boiler which includes a top panel and a pair of side panels, said casing top panel being spaced from the top of the boiler to form a top smoke flue which extends longitudinally of the boiler and has communication at its rear end with the combustion chamber, the casing side panels being spaced from the sides of the boiler to form branch smoke flues, said casing having a smoke pipe opening with which the branch lines have communication, bafile plates secured to the boiler and forming partitions between the top flue and the branch flues, said top flue extending from the rear of the boiler to the front end thereof, said baffle plates being spaced from the face plate extension to leave smoke openings between the top flue and the branch flues, said face plate extension and the baflle plates having seats for the casing side and top panels, and clamping strips secured to the baifle plates for holding the casing side and top panels in their seats in the baffle plates.

4. The structure defined in claim 3 which further includes means for securing the clamping strips to the face plate extension.

5. A boiler of the class described having a combustion chamber, a casing for the boiler comprise ing top and side panels, the top panel being spaced from the boiler to form an upper smoke flue, the receiving end of which is in communication with the combustion chamber, the side panels being spaced from the boiler to form branch smoke fiues, a pair of baiiie plates extending obliquely between the upper longitudinal corners of the boiler and the upper longitudinal corners of the casing and forming partitions between the upper line and the branch flue, said baflies being arranged to leave smoke openings between the upper flue and the branch fiues, said casing having a smoke pipe opening with which the branch fiues having communication, said baflle plates having seats from which the top panel is supported.

6. A boiler of the class described having a combustion chamber, a casing for the boiler comprising top and side panels, the top panel being spaced from the top of the boiler to form an upper smoke flue, the receiving end of which is in communication with the combustion chamber, the side panels of the casing being spaced from the sides of the boiler to form branch smoke fiues, and a pair of baffle plates onthe boiler form- Ill) 

